Main distributer for telephone-exchanges.



PATENTED OCT. 3, 1905.

G. DEISENHOFER. MAIN DISTRIBUTER FOR TELEPHONE EXCHANGES.

APPLICATION FILED MAYSI, 1905.

4 SHEETS-SHEET l.

No. 801,186. PATENTED 00E. 3,1905. G. DEISENEOEEE. MAIN DISTRIBUTER FOR TELEPHONE EXOEANGEE.

APPLICATION FILED MAY 31, 1905.

' 4 SHEBTB SHBET 2.

PATENTED OUT. 3, 1905.

G. DEISENHOPER. MAIN DISTRIBUTER FOR TELEPHONE EXCHANGES.

APPLICATION FILED MAY31, 1905.

4 BHEETSSHEET '3.

UNITED STATES PATENT OFFICE.

GEORG DEISENHOFER, OF MUNICH, GERMANY, ASSIGNOR TO THE FIRM OF DEUTSOHE TELEPHONWERKE R. STOCK & 00., G. M. B. 1-1., OF BER- LIN, GERMANY.

MAIN DISTRIBUTER FOR TELEPHONE-EXCHANGES- Specification of Letters Patent.

Patented Oct. 3, 1905.

Application filed May 31, 1905. Serial No. 263,035.

To (bZZ whom it may concern:

Be it known that I, GnoRe DnIsENI-IoFnR, engineer, a subject of the German Emperor, and a resident of Munich, Bavaria, Germany, have invented new and useful Improvements in Main Distributers for Telephone-Exchanges, of which the following is a specification.

In main distributers hitherto common in telephone-exchanges for permitting any desired connection to be made between the outside or street cables, hereinafter called linewires, and the conductors leading to the multiplex, hereinafter called switchboardwires, the vertical and horizontal terminal members lie alongside one another upon both faces of the distributer-frame in such manner that a definite distance is left between each terminal member in order to be able to conveniently reach with the arm between the terminal members into the frame. By this arrangement, however, the length of the frames, owing to the ever-increasing number of contacts, becomes very considerable, as neither the breadth or the various strips or terminal members nor the distance between them can be reduced.

In the main distributer forming the subject of the present invention the arrangement of the terminal members is such that the length of the frame for an equal number of contacts is reduced to about one-half of that hitherto necessary without affecting the accessibility of connecting the various wires. For this purpose in a main distributer according to this invention the two terminal members of a pair are arranged close alongside each other and at the same'time are so placed that the broad faces thereof lie turned to each other. In this way a space-economizing arrangement is secured in that formerly the clamping-screws were only applied to one face of the terminal members, whereas they now extend into three directions. Between every pair of such terminal members there remains, therefore, the usual distance necessary for drawing in the conductors for the workman to put his hand through, while only sufiicient space remains between the clamps or terminal posts of a pair to work with the fingers. In order, however, to still further diminish the total space required and for the purpose of enabling the fine fuses, hitherto mostly mounted on separate wall-faces, to be connected direct to the clamps or terminal posts of the terminal members and to provide an interruption place the terminal posts are of a special formation. The terminal members situated vertically to the front face of the frame are so utilized upon three sides that the connections With the conductingwires, hereinafter called cross-wires, are made on the rear small side, while the linewires are connected to the terminal posts, extending from the inner broad side. The terminal posts, however, stand out with their 5 free ends on the outer broad side, so that these ends can be connected by fuses. These clamps or terminal posts instead of being stamped out of sheet metal, as heretofore usual, may preferably be bent out of round wire, which 7 in addition to the advantage of a simple application of plugcontactsfor instance, of those of the fine fusehas the advantage of a simple and in consequence of the avoidance of all waste a cheap method of manufacture and, moreover, results in a construction whose strength is equal in all directions to the projecting soldering ends of the clamps.

The clamps connected to the line-wires are not in direct connection with those connected to the multiplex conductors or switchboardwires; but, on the contrary, each of these clamps terminates in a projecting pin, which pins serve for the reception of a plug-contact carrying the fine fuse of ordinary known con- 5 struction and commonly used for other purposes. The pins can also be connected to a measuring instrument by a similar plug-contact for the purpose of examining the conductor. 9

Some of the terminal posts consist simply of straight pieces of wire, which are passed through holes in the insulating terminal members and fastened by nuts, while others are bent at right angles to prevent them from rotating. This special arrangement and construction of the terminal members is only necessary for the vertical terminal members, as their number in general is substantially greater than that of the horizontal ones on I account of direct connections, &c., and as, moreover, only these vertical terminal members receive the fuses. The terminal posts of the horizontal terminal members are therefore simply bent out of wire.

The accompanying illustrative drawings show a main distributer of this kind, Figures 1, 2, and 3 being front, side, and rear views, respectively. Fig. 4 is a front view, to a larger scale, of a pair of terminal members. Fig. 5 is a side view thereof, and Fig. 6 is a trans verse horizontal section corresponding to the line A B of Fig. 1. Fig. '7 is a plan of the main distributer to a larger scale than that of Figs. 1, 2, and 3. Figs. 8 and 9 are, to a larger scale, a detail of the frame in plan and side elevation, respectively.

The main distributer, according to the present invention, consists in L-shaped bar-irons 1, lying on the ground and to which the vertical bars 1, of iron, are fastened. Horizontally joining these bars 1 there are flat iron bars 1, extending from the front to the rear end of the frame. 1 are bars of flat iron extending from the one side to the other of the frame and to which on the rear end the horizontal terminal members 1 are secured.

In front of the vertical bars 1 the vertical terminal members 2 are arranged in parallel pairs and supported by iron carriers 15 of any suitable form. As shown clearly in Fig. 6, these terminal members carrying the terminal posts 10 and 11 are arranged with their broad faces opposite to each other and are slightly spaced apart, but with the usual distance between each set of pairs, as shown in Figs. 1 and 7.

Between the terminal posts of the vertical front and the horizontal rear terminal members the connection can be made in any desired manner by means of cross-wires 6, so that in case of change of residence every telephone subscriber can keep his call-number. The terminal members 2 of the front end of the frame are arranged in pairs with only a small space between the members of a pair just sufficient to work the connections between the clamps 10 and the line-wires 3 (Figs. 8 and 9) with the fingers, while a comparatively greater space has been left between each pair of strips or terminal members for the purpose of reaching with the arm through the frame and drawing through and soldering or clamping the connecting or cross wires 6.

The operation of completing a circuit is illustrated in Figs. 8 and 9, wherein a line-wire, designated as the positive pole, coming from the town mains 3 is soldered or fastened by clamping-nuts to the terminal posts 10. The current passes now through the fuse (indicated by 14) and through the cross-wire 6 to a positive terminal of the horizontal terminal members 1 and is then traced by the switchboard-wires 5 to the multiplex switchboard of the telephone oflice or central station. Here the desired connection is made and the current is sent back through a switchboardwire 5, through a negative terminal post on the terminal members 1, and through a crosswire 6 to a negative terminal post extending on the rear end of the front terminal member 2. From there the current passes through the fuse 14 to the line-wire of the subscriber.

Each vertical strip or terminal member 2 consists of a pair of ebonite strips or plates 8 and 9, tangentially disposed face to face; but, as illustrated in Fig. 6, it may be desirable in addition to these strips to provide a foundation-piece 7, preferably of oak wood.

The terminal posts 10 and 11 consist of round wire, and the posts 10 for joining onto the line-wires are straight, whereas the posts 11 for joining onto the cross-wires and to the switchboard-wires are bent at right angles, one end of each post being disposed between the adjacent faces of the strips 8 and 9, a groove being cut in one of these strips to receive said end and the other end passing laterally through corresponding holes in the ebonite plate 9, so that rotation of these posts is prevented. The rear ends of these bent posts 11 are alternately straightand also somewhat bent out, so that the soldering-points lying alongside one another are shifted out of a plane. The terminal posts 10 are each provided with suitable means for securing or binding them to the member 2. In the drawings these means are illustrated by the nuts 12 and 13, engaging screw-threaded portions on the terminal posts.

All the posts end in short pins 10 and 11, that project beyond the ebonite plate 9 and serve to receive the line fuses which make the connection between the terminal posts, the fuses being stuck onto these pins after the manner of a plug-contact, as indicated in Figs. 8 and 9 at 14.. These pins may be also utilized to join the conductors to measuring instruments.

Having now particularly described and ascertained the nature of the said invention and in what manner the same is to be performed, I declare that what I claim is 1. A distributing-frame having a plurality of terminal members arranged in spaced parallel pairs having broad inner and outer faces, the interstice between the members of a pair being comparatively less than the spaces between pairs, in combinationwith a plurality of terminal posts extending transversely of each of said members and having ends'projecting beyond the outer and inner broad faces thereof, and a plurality of terminal posts having one of their ends projecting beyond one broad face and their other end beyond one edge face of said member, substantially as described.

2. A distributing-frame having a plurality of terminal members arranged in spaced parallel pairs having broad inner and outer faces, the interstice between the members of a pair being comparatively less than the spaces between pairs, in combination with a plurality of terminal posts extending transversely of each of said members and having ends projecting beyond the outer and inner broad faces thereof, and a plurality of terminal posts having one of their ends projecting beyond the outer broad face and their other end beyond the rear edge face of said member, substantially as described.

3. A distributing-frame having a plurality of terminal members arranged in spaced parallel pairs, the interstice between the members of a pair being comparatively less than the spaces between pairs, in combination with a plurality of terminal posts extending transversely of said members, a plurality of terminal posts having an end disposed angularly to said first-mentioned terminal posts, and fuse connections interposed between one of the ends of each pair of respective terminal posts, substantially as described.

4. A distributing-frame having a plurality of terminal members arranged in spaced parallel pairs, the interstice between the members of a pair being comparatively less than the spaces between pairs, in combination with a plurality of terminal posts extending transversely of each of said members and a plurality of bent terminal posts having one of their ends projecting in the same direction as one of the ends of the said first-mentioned terminal posts and adjacent thereto and their other ends projecting at angles thereto, and fuse-plugs directly connecting the adjacent ends of each pair of respective terminal posts, substantially as described.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

GEORG DEISENHOFER.

Witnesses:

ULYssEs J. BYWATER, ABRAHAM SOHLESINGER. 

